Collectible coins, especially those from the United States, include a variety of types. Among these are the Two and a Half Dollar coins, also known as quarter eagles, which were minted in various years, including 1866. Patterns and trial coins represent experimental designs or denominations that were not widely produced or released. The 1866 coins are significant as they marked the transition to new designs and the introduction of the motto "In God We Trust" on some coins. Collectors seek these coins due to their historical importance, rarity, and potential for value appreciation.

Item Denomination Series Year Mint
United States of America 1866 Philadelphia Patterns & Trial Coins $2.50 $2.50 (Two and a Half Dollars) Patterns & Trial Coins 1866 Philadelphia